4th International Submarine Canyon Symposium (INCISE2018)

5-7 November 2018, Shenzhen, CHINA

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This is the detail of Deciphering the sediment sources in Taiwan Canyon, northwestern South China Sea

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Author
Menjun Li
Co-Author(s)
Naishuang Bi, Lisha Hu, Xuefa Shi, Jingping Xu
Abstarct Title
Deciphering the sediment sources in Taiwan Canyon, northwestern South China Sea
Abstarct Body
During the Chinese DSV (Deep Submersible Vehicle) JiaoLong's Dive #140 in May 2017, several push cores were taken along as well as across the axis in the middle reach of Taiwan Canyon, northwestern South China Sea. Grain size analyses clearly showed a much coarser layer in the bottom 4 cm of the 15 cm-long push core taken immediately downstream the toe of a gigantic cyclic step. Delineation of benthic foraminifers showed a shallow water assemblage (Florilus scaphu、Elphidum advenum、Pseudorotalia Schroeteriana) in the coarser sediment section and a deep water assemblage in the upper part of the core. This is a strong evidence of downslope sediment transport by gravity flows along the Taiwan Canyon. Clay mineral and Rare Earth Element work suggest that the push core sediments are composed of major sources from Taiwan island and minor sources of Pear River and Luzon islands.
INCISE Theme
Special Session: Canyons and trenches in the South China Sea and West Pacific
Presentation Type
Oral Presentation
Keywords
Taiwan Canyon, sediment sources, Forams

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